The Washington Post @washingtonpost
Nearly everyone — 99 percent of the global population — is exposed to unhealthy levels of tiny and harmful air pollutants, known as PM 2.5, according to a new study. “Almost no one is safe from air pollution,” Yuming Guo, the lead author, told The Post. https://t.co/zs7fcXL4R9 — PolitiTweet.org